Heat-Away 638 Thermally Conductive Aluminum Nitride Grease

Heat-Away 638 is an aluminum nitride filled, thermally conductive grease which offers exceptional thermal and electrical properties to 550°F (288°C). This material is used in high-power electronic devices, heat pipes, and other heat exchange systems.

On the picture, Heat-Away 638 is used as a heat transfer grease between a high temperature ballast resistor and an aluminum heat sink.